Matrix-drying press.



W. H. WALTON & H'. D. TAPPAN.

MATRIX DRYING PRESS.

APPLICATION FILED APR-21. 1911.

1,891,888; Patented Apr. 29,1919.

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MATRIX DRYING PRESS.

APPLICATION HLED APR. 2!. I917.

mwmasa Patented Apr. 29,1919.

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In? inli lllllllln l ,3 15/ {(5 /A/VENTORS 13 1% WALTER H.WALTONMRRYDMPPAN ED STATES PTNT nine.

WALTER H. WALTON AND HARRY D. TAPPAN, F PHILADELPHIA, PENNSYLVANIA.

MATRIX-DRYING- PRESS.

Specification of Letters Patent.

Patented Apr. 29', 1919.

Application filed April 21, 1917. Serial No. 163,758.

. drying to be compensated by springing preschine. Fig. 2 is a plan viewof same.

sure of the platen, whereby suflicient pressure upon the matrix and thedie is always maintained. Our machine is simple in construction, veryquick in operation, and gives an exceedingly even pressure upon thematrix.

Matrix making machines are used to make matrices for stereotyping. Thedie, which is the matter to be stereotyped, and may consist of type setin a frame, another stereotype, an electrotype, or any of many otherthings of this characteror a combination of them, has placed over it isa paper like material,

the matrix, which which is usually pressed down on and into the die, andthen placed in the matrix making machine. beneath sure exerted by themachine until thoroughly dried. Textile or other yielding fabrics areplaced over the die and matrix and their and the matrix shrinking occursduring the drying.

Figure 1 is a side elevation of the. Inna;-

, 1g. 3 is a side view of same up to the bottom of the cross beam of thepress. Fig. 1 is a view of a die and a superimposed matrix. Fig. 5

is a vertical section of a compressor, and Fig. 6 is a view of the lefthalf of the platen with the superimposedsprings.

2] is the heated table usually heated by steam and called, independentlyof how heated, the drying table the frame work of the press being formedof the standards 1, 1, and the cross beam 3 The vertically moving platen5 is adapted to hold, between it and the drying table, the die 17, thematrix "fiat andthe sanijgressible textile ether blankets and heatedunder the presmaterial technically known as the blankets 18. The platen5 is provided with positively acting mechanism and springing mechanismfor driving down the platen on the blankets, matrix and die. The mostconvenient form of which I am at present aware of combining andconstructing these two mechanisms is as follows: A spider 6 has placedbetween it and the platen, the springs 8. By distributing these springsin. the form of a circle (see particularly Fig. 6) a very even pressureis given to the platen especially as springs can be secured of standardshape and elasticity. Between the spider and the beam of the press is ahydraulic compressor 24 which for reasons seen below we regard as thebest device for giving the positive pressure of thejplaten 'upon theblankets, matrix and die. The base 31 of this compressor 24 rests on thespider 6. The gage 27 indicates the pressure exerted by the compressor24. The mechanism of a good form of the compressor is shown in Fig. 5.The head 25 is screwed to the concentric cylinders 34:, 36. The cylinder35, fits between them and is closed atthe bottom. The plug 37 carriesthe valve 32 held against its seat by the spring 33. The bucket 37 iscarried by the cylinder 36 and has the washer 39 fitting against theinside of the wall of the cylinder 35. The plunger 29 has the valve 313,the head 27 is operated in any usual way. The head is manipulated by thehandle 23, which, when in normal position, has the downward travelimparted to it by the plunger 29 limited by the stop 26 impingingagainst an enlarged part of the arm 23, but which, when moved fromnormal position allows the plunger 29 to be depressed until thisdepression opens both of the valves 32 and 313. This construction givesthe press a convenient quick release mechanism for relieving thecompression on the platen instantly. The gage 37 is connected beneaththe valve 32. The standard 30 has a socket in which the cylinder 34:

. springs 9,

useful results. The thrust of the compressor is directly downward andcan be halted at any point where the exact amount of compression desiredhas been attained. The

direct downward thrust has especial advantages in our device; among themthat although necessarily the platen is brought at first into lightcontact with the matrix,

and its pressure on the matrix then increased by the compression of thesprings, the matrix will not be disturbed by any lateral or torsionaltendency of the compressor. Such movement would give an irregular motionto the springs and would frequently blur and spoil the matrix. Thevarying thickness of the material to be pressed and the variation tosome extent of the pressure to be exerted upon the matrix makesfrequently very inconvenient a compressor with a fixed length of travel.

'We prefer to lift the platen 5 by hand assisted by a counter balance.The form of counter balance we adopt in practice is 9 secured by thestaples 7, 7 and adjustably nuts 15, 15, balance should not besuflicient to lift the platen 5, so that the latter, unless otherwisesupported will sink of its own weight upon the blanket 13, matrix 191and die 17 The hand mechanism for lifting the platen 5,

consists in practice of the head 16, movable vertically and providedwith guides 40, 40, which the platen be secured to the head by nuts 14:,14. The head is lifted by and with tie rods 11, 11, by is lifted. Theserods can a toggle mechanism very conveniently consisting of a handle 19secured to the shaft 20 having hearings in the beam 3, and having thearm 12 connected by the pivot 21 to the arm 13, which is secured to theshaft 22.

The shaft 22 has bearings in the head 16.

The shafts 20 and 22 extend through the beam 3 and the head 16 and havethe arms.

121 and 131 secured to them. These arms are pivoted similarly to thearms 12 and 13 and the toggle can be suitably stopped just past 3 deadcenter.

The platen 5 being ralsed, the toggle can a be pushed past dead center,the plunger 29 being depressed so as to open both valves 32 and 313, theplaten will settle down of its own weight on the blanket 18, the matrix191 and the die 17. The compressor is then brought into action, and thecompression continued until the desired pressure is attained, which willbe indicated by the gage 27. If the gage indicates a lowering of thepressure through the too great relaxing of the springs caused by theshrinking of the 7 blanket, and matrix, the pressure can be in creasedby the compressor. Of course, the -springs are made of such strength andelasattached to the beam 3 by the tie rods'lO, 10 which are adjustablyheld by the We prefer that the counter V 1 tion with the drying table,

ticity that no need will exist once the pres- 6 sure is applied for anyaction of the compressor, in practice.

When the matrix hasbeen dried, the plum ger 29 can be depressed openingthe .valves 32 and 313and the platen is easily lifted 7i by thetoggle.

ec1aim.:. -..1., 1. Ina matrix drying press, the combination with thedrying table, press frame and platen, of a positive acting hydraulically7 operated compressor having a direct down ward thrust and elasticyielding devices operatively situated between the platen and the pressframe. I

2. In a matrix drying press the combination with the drying table, pressframe and platen of a positively acting compressor and elastic; yieldingdevices operatively situated between the press frame and the platen andan independently operated platen lifter.

3. In a machine-for drying matrices, the

combination with the drying table, press frame and platen of acounterbalance for the platen, a positively acting compressor, elasticyielding devices operatively situated between the platen and the pressframe and a platen lifting mechanism.

4. In a matrix drying press, the combination with the drying table, thepress. frame and platen of a positivelyacting hydraulic 95 and platen ofa positively acting compressor, and elastic yielding devices operativelysituated between the press frame, and the platen, a counterbalance forthe platen, and a toggle mechanismffor liftin and lowering the platen. 1v p v 7 In a matrix dryingpress, the combina tion with the drying table,press frame and platen of a: compressor, operative connect ions betweenthe. press frame and the platen,

a counterbalance for said platen, a head con nected to the platenby'links and a toggle mechanism for raising the platen. V

8. In a matrix" drying-press,thecombination with the drying table, pressframe and platen of a compressor operat ive .connec-,

, tions between the press frame and the platen, a direct downwardthrust, a spider, and

a counterbalance for said platen and an insprings between the spider andthe platen, 10 dependent mechanism for raising said and arrangedapproximately in a circle. platen, the counterbalance being insufficientIn testimony whereof we afiix our signa- 5 in itself to raise theplaten. tures.

9. In a matrix drying press, the combination of the frame, bed, andplaten, of a posi- WALTER H. WALTON. tively acting hydraulic compressor,having HARRY D. TAPPAN.

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